The very first bender(Avatar harem x male autistic reader)

When the lion turtle started to give bendings to others, there was one young boy that standed out from the others. All of this because he was the very first person who the lion turtles entrusted their element bending abilities. This ypung boy could manipulate the four elements despite his young age and didn't get corrupted by the power. But humans were scared of him and chased him to the end od the world, to the south pole where the boy was then trapped in ice for thousands of years before he was awakened by a water bender named Katara and her brother Sokka as they had just awakened tne avatar who also was stuck in ice.